| Grynfeltt | Joseph C., French surgeon, 1840-1913. See: Grynfeltt's triangle. (05 Mar 2000) |
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| Grynfeltt's triangle | A triangular space bounded above by the end of the last rib and the serratus posterior inferior muscle, anteriorly by the internal oblique, and posteriorly by the quadratus lumborum; lumbar hernia occurs in this space. Synonym: Lesshaft's triangle. (05 Mar 2000) |